1012005305 has 8 divisors (see below), whose sum is σ = 1229038272. Its totient is φ = 799849648.

The previous prime is 1012005289. The next prime is 1012005307. The reversal of 1012005305 is 5035002101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1012005305 - 2⁴ = 1012005289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012005307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218869 + ... + 1219698.

It is an arithmetic number, because the mean of its divisors is an integer number (153629784).

Almost surely, 2^1012005305 is an apocalyptic number.

It is an amenable number.

1012005305 is a deficient number, since it is larger than the sum of its proper divisors (217032967).

1012005305 is an equidigital number, since it uses as much as digits as its factorization.

1012005305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438655.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1012005305 is about 31812.0308216876. The cubic root of 1012005305 is about 1003.9858601443.

Adding to 1012005305 its reverse (5035002101), we get a palindrome (6047007406).

The spelling of 1012005305 in words is "one billion, twelve million, five thousand, three hundred five".